Reflector

Origin

reflect + -or

Full definition of reflector

Noun

1. Something which reflects heat, light or sound, especially something having a reflecting surface.
• 1898, Winston Churchill, The Celebrity Chapter 5, Then came a maid with hand-bag and shawls, and after her a tall young lady. She stood for a moment holding her skirt above the grimy steps,..., and the light of the reflector fell full upon her.
2. A reflecting telescope.
3. A small, often red, reflecting disk on the rear of a vehicle or bicycle that reflects the headlights of other vehicles.